2524
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4424
- Proper Divisor Sum (Aliquot Sum)
- 1900
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1260
- Möbius Function
- 0
- Radical
- 1262
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 40
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers k such that k^64 + 1 is prime.at n=27A006316
- Coordination sequence T3 for Zeolite Code BRE.at n=33A008060
- Coordination sequence T1 for Zeolite Code EUO.at n=31A008095
- Coordination sequence for tridymite, lonsdaleite, and wurtzite.at n=31A008264
- Crystal ball sequence for planar net 4.8.8.at n=43A008577
- Aliquot sequence starting at 180.at n=32A008891
- Spontaneous magnetization coefficients for square lattice spin 1 Ising model.at n=17A010102
- Numbers k such that the continued fraction for sqrt(k) has period 92.at n=1A020431
- a(n) = [ a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ], for n >= 3.at n=25A022865
- Numbers k such that Fibonacci(k) == 3 (mod k).at n=31A023175
- Numbers with exactly 6 1's in their ternary expansion.at n=16A023697
- c(i,j) is cost of evaluation of edit distance of two strings with lengths i and j, when you use recursion (every call has a unit cost, other computations are free); sequence gives c(n,n).at n=5A027618
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 24.at n=37A031522
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 34 ones.at n=4A031802
- Numbers with exactly five distinct base-7 digits.at n=0A031984
- Number of partitions of n into parts not of the form 23k, 23k+9 or 23k-9. Also number of partitions with at most 8 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=26A035997
- Sums of 6 distinct powers of 3.at n=9A038468
- Number of partitions satisfying cn(0,5) + cn(1,5) <= cn(2,5) and cn(0,5) + cn(1,5) <= cn(3,5) and cn(0,5) + cn(4,5) <= cn(2,5) and cn(0,5) + cn(4,5) <= cn(3,5).at n=37A039882
- Numerators of continued fraction convergents to sqrt(303).at n=5A041570
- Numbers n such that string 1,4 occurs in the base 9 representation of n but not of n-1.at n=35A044264